Question

I have a code that i have to do it through LINQ

var airlineNameList = new List<string>();

foreach (DTTrip trip in contract_.Trips)
{
    foreach (DTFlight flight in trip.ListOfFlights)
    {
        airlineNameList.Add(flight.AirLineName);
    }
}

How can do it through LINQ.
Note: contract_ is the object of class.

Please Help..

Answer 1

var resultList = contract_.Trips
      .Cast<DTTrip>()
      .SelectMany(trip => trip.ListOfFlights.Cast<DTFlight>())
      .Select(flight => flight.AirLineName)
      .ToList();

Don’t you also need Distinct?